Cooling radiator for aeroplanes and other vehicles and process for its manufacture



April 1927' A. LAMBLIN COOLING RADIATOR FOR AEROPLANESANDDTHER HICLESAND PROCESS FOR ITS MANUFACTUR Original Filed Jan. '7. 1925 2Sheets-Sheet 1 v AMBLIN v COOLING RADIATOR FOR AEROPLANES AND OTHERVEHICLES AND I PROCESS FOR ITS MANUFACTURE Original Filed Jan. '7. 19252 Sheets-Sheet 2 Afiril 19,19'27. A L 1,625,665

' ments, havin ment on linev 3-1-3 of Figure-2,

I I '30 radiator with 48* on line ,15-1 5 of Figure Patented A r,19,-1927-.

[was UNITED sraras rATaNr OFF-ICE.

Arum-nan manna, on runs, amen.

MANUFACTURE. i

Original applioationaled January 1, 1925, Serial a...

1,012, ma in France January 24. mas. new and thisapplication filedJenner; 9, 1826. Serial No. 80,188.

' This invention relates tocooling tors for aero lanes and othervehices, comprising easil; manufactured cooling elea small weight and alarge radiatin 'sur ace. *These elementsare characteriz by their crosssection be ng in the .shape of a V, the branches of which have a largesurface of contact .with the, cool ng air. The present application s a.d1vision 1 of my co-pending patent application 1012, filed J anuary7th, 1925. r

\ radia- Several constructions according to the in- I vention: are shownby way of example in the accompanying drawings in which Figure 1- is anelevation of a cooling eley .ment according to the invention Figure2across sectioniof the said elef ment on line 2-2 of Figure 1,

. Figure3 a longitudinal Figures 4 and 5 two cross'sections'oi twomodified constructions ofthe-element shown in-Fi real-3' gu sections ofa third modi- 2 fied' construction of the element of Figures a 1 to 3,these four sections corresponding to four successive'stages ofmanufacture of the said element, FigurelO is a annular headers, providedwith elements like those in Figures 1 to 9; this radiator being mountedon the fuselage I of the' aeroplane,

V Figure 11 isa cross section of this radi 85 ator on line 11-11 ofF1gure 10,

Figure 12 is a section'similar ra iator,

' Figurel? is a longitudinal section of a radiator like the precedingones, provided with a special air regulating-device,

Figure 14 is a partial plan of the said radiator, f Figue 15 is a crosssection of this radiator 13, and I Q Figure 16 is a side elevation,on-an enlarged scale, of a shutter of the-a r re ulating device of theradiator shown in igures 13-15.

The coolin element (Figures 1 to 3) r is constitute by two sheet metalplates 51 and 52 bent along their central rib so as to form twodifferent angles and These tion: ct the longitudinal section of a re 10,of another construction .of thecoonme mm'roiz r03. annornms vAnn OTHERvanrcnns m .rnocnss non rrs two plates are inserte d into each'other(Figure 2,) and, owing to the diflerence-in the angles a and ,8, the twoplates 51 and 52 direction of the arrows 56 in the free space leftbetween the plates 51 and 52. The aircirculates both between the twowings of these two wings An element of light weight and with great I iradiating surface is thus obtained, which element ensures a division ofthe air currentinto elementary veins properly guided along the element.

described can be manu- The element just factured by means'of differentroces'ses.

Thus, Figure 4 shows a mod ed construe-- .tion of the'element of Figures1 to 3, in

which the plate 51 has. two turned over.

edges 58 which cover the edges of the plate 52 and are soldered to them;a much stronger assembly of the plates 51 and 52 on each other'is thusobtained.

*the V formed by the element and outside 1o 'The cooling element. withV-shaped cross "section could also be made, as shown in Fig- 'ure 5',from a single plate 59 suitably bent to that oft'over; one of the freeedges 60 of this plate is bent over and soldered to the other edge;

This method of manufacture offers the advantage of reducing by half thenumber of soldered joints and therefore of simplifying the manufactureand reducing to a great extent the risk of leakage of water.

Y The new elements with V shaped cross section could also bemanufactured in. a single piece without any soldering as indicated inFigures 6 to 9. A round or flattened tube 61 (Figure v6) is used. Thistube is stped out or expanded so as to leave flat one of its faces 61and bending the other face 61 (Figure 7). Finally, the element is givenits final shape by bending or stamping out (Figures 8 and 9).

The invention coversv the previously described cooling elements (Figures1 to 9) in themselves, whatever be the special grouping in which theseelements are used; the invention covers also certain arrangements ormethods of grouping hereinafter described and ofi'ering specialadvantages.

Thus, Figures 10 and 11 show a radiator constituted by a certain numberof elements with V-shaped cross section connected by means of tubes 65,66 to a front header 62 and a rear header 63 placed in the interior ofthe hood 6% of the vehicle and fitting the rounded shape of the saidhood (Figure 11).

lVater inlet and outlet ducts 67, 68 conmeet the headers 62, 63 to thejacket of the engine.

The arrows 56 and 57 show respectively the circulation of the water andthat of the air in the radiator.

It will be seen in Figure 11 that owing to the arcuate shape of theheaders 62. 63, the elements 50 with V-shaped cross section divergerelatively to each other starting from the headers. It is thereforepossible to bring the bases of the tubes 66 as close together as may bedesired on the headers, without the V-shaped elements 50 fouling eachother; on the contrary. these elements, in diverging from each other.always leave between them a free passage for the cooling air.

Thus, the combination of V-shaped elements with curved, for instancecircular or semi-circular, headers makes it possible to fit the greatestpossible number of elements on a given length of the header, and toobtain for a radiator of a given weight, as great a radiating surface aspossible.

To facilitate the penetration into the air of the radiator with V-shapedelements, and to enable it to fit more easily the rounded shape of itssupport, for instance of the aeroplane fuselage, these elements can begiven a longitudinal shape convex or concave towards the exterior of theradiator, as indicated in Figure 12.

The invention covers also the combination of a radiator with elementswith straight section in the form of a V, such as the radiators ofFigures 1 to 12, with means enabling two air circulation currents to beadmitted into the said radiator, one longitudinally of the coolingelements, and the other transversely of the said elements; means such asshutters, or screens make it possible to regulate advantageously at willone or the other of the two currents or both together.

Figures 13 to 16 show a construction of that arrangement.

Under the hood T3 of the aeroplane is mounted a radiator with headers 62and 63 on which are branched elements 50, the radiator being such asthat of Figures 10 and 11 for instance. This radiator replaces thus aportion of the hood and is adapted to the general shape of this hood andthe elements 50 project freely into the atmospheric air.

An air inlet chamber 110 is provided in the hood. A shutter 84 ispivoted at 85 in front of the radiator. Other shutters 74 a: e providedin the interior of the radiator; each of these shutters is pivoted abouta pin 75 (Figure 16) and secured to a. control rod 76 and to a returnrod 77 with a spring 78.

All the control rods 76 of the shutters 74 are connected together by acoupling rod 79 which the pilot can pull in the direction of the arrow80 by means of well known con trol mechanism, with lever and toothedquadrant for instance, not shown in the drawings.

The radiator of Figures 13-16 works as follows: when the pilot does notpull on the coupling rod 79; the springs 78 pull the rods 77 in thedirection of the arrow 81 (Figure 16) and keeps the shutters 74 appliedclosely against each other; these shutters thus completely close theinterior of the radiator. Under these conditions, the radiating group 50is traversed only in the ordinary manner by the air current 106: theveins of this current are besides guided by the whole of the shutters 74which form an air guide plate.

When the pilot wishes to get a greater cooling of his engine. and toincrease the supply of air to his radiator. he o erates the controlmechanism so as to pull in the direction of 80 the coupling rod 79, allthe shutters 74 turn about their spindles 7 5 and cock the springs 78.Under these conditions the air current- 83 which gets into the interiorof the bonnet 73 through inlets not shown in the drawings, is dividedinto elementary currents S3 83 etc. which pass between the shutters 7 1and combine with the air current 106 which normally plays on theelements 50.

In short, the combination described in the foregoing makes it possibleto obtain three entirely different states of working of the radiator.

1. The shutter 84 is lowered, and the shutters 7e are applied againsteach other; the air current 106 is stopped by 84, and the air current 83by 74, and the radiator works with the minimum cooling.

2. The shutter 84: is raised and applied against the hood (dottedposition in Figure 13) the shutters 74 are applied against each other;the air current 106 passes'freely through the radiating gr0up50, but theair current 83 is stopped by the shutters 7 4:, and the radiator worksthus with the mean or average cooling.

3. The shutter 84 is raised and applied against the hood, and theshutters 74 are opened in the positions shown in Figure 13; the'aircurrents 83 and 106 pass through the radiator as already explained, andthe rabetween the three states of cooling hereinbefore indicated, byraising more or less the shutter 84 and opening more or less theshutters 74. i

' 'It will b'e seen that in the construction of Figures 13 to 16, whenthe shutter 84 of this radiator is raised and applied against the hood73 of the aeroplane, and when the shutters 74 are opened as shown inFigure13',

- theair veins 83 and 106 are mixed together,

and superposed in the free spaces 90 provided between the adjacentelements (Figure 15). these free spaces 90 decrease in their outsideportions owing to the inclination of the wings of the V' the aircurrents 83, 106 are held and guided between the adjacent wings of theadjoining V elements.

The air currents 1C6 alone remain in the inner free space 91 of the Vconstituted by each element 50 and continue to circulate freely in thesaid V without any possibility of being" deflected'by the auxiliary aircu'r rent 83.

I claim: j P

In a cooling radiator for aero lanes and other vehicles, the followingcom ination; a front header, a rear header, tubular elements of.V-shaped transverse section, said elements having free spacestherebetween and being interposed between the front and the rear headersand disposed longitudinally with respect'to the direction of movement ofthe vehicle, shuttersivotally dis sed on the base portions of tlietubular 5 means for controlling said shutters in a manner either to opensaid shutters with respect to each other in order to permit a transversecurrent of air to penetrate between the elements or to close saidshutters with respect to each other, and means forguiding a current ofair longitudinall to circulate in part between the wings 0 the -V ofeach element and inpart between the frees aces formed between saidelements,

,te'r'current of air, when said shutters are cloTsed with respefitto'giichflgher. n testimony'w ereo a ysi ature.

ALEXANDRE MIN."

ements,

saids utters serving. also to guide saidlat-

